User Guide

Nokia Customer Care Troubleshooting - RF
6015/6015i/6016i/6019i (RH-55), 6012 (RM-20)
Issue 1 - Revision 002 09/2004 ©2004 Nokia Corporation Company Confidential Page 45
If you do not see the VCTCXO signal at any of these points, check to see if there is
voltage at the following points:
• VR3, main supply line for VCTCXO circuitry, should be 2.78VDC
• AFC voltage, should be between 1 and 3 V, and should be adjustable with the FC
slider on the RF PDM Control dialog box in Phoenix. If the AFC voltage is
missing, check the UEM.
Measuring the AFC Voltage
1. Measure the DC voltage at R502.
Figure 36: AFC voltage measurement location at R502
2. Open the RF PDM dialog box component in RF.
Figure 37: RF PDM dialog box for AFC measurement